Subversion Repositories HelenOS

Rev

Rev 2109 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1888 jermar 29
/** @addtogroup sync
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1888 jermar 35
#ifndef KERN_WAITQ_H_
36
#define KERN_WAITQ_H_
1 jermar 37
 
38
#include <arch/types.h>
39
#include <synch/spinlock.h>
40
#include <synch/synch.h>
788 jermar 41
#include <adt/list.h>
1 jermar 42
 
2310 jermar 43
typedef enum {
44
    WAKEUP_FIRST = 0,
45
    WAKEUP_ALL
46
} wakeup_mode_t;
1 jermar 47
 
557 jermar 48
/** Wait queue structure. */
2085 decky 49
typedef struct {
557 jermar 50
 
51
    /** Lock protecting wait queue structure.
52
     *
53
     * Must be acquired before T.lock for each T of type thread_t.
54
     */
623 jermar 55
    SPINLOCK_DECLARE(lock);
557 jermar 56
 
2106 jermar 57
    /**
58
     * Number of waitq_wakeup() calls that didn't find a thread to wake up.
59
     */
60
    int missed_wakeups;
61
    /** List of sleeping threads for wich there was no missed_wakeup. */
62
    link_t head;
2085 decky 63
} waitq_t;
1 jermar 64
 
65
#define waitq_sleep(wq) \
2089 decky 66
    waitq_sleep_timeout((wq), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE)
1 jermar 67
 
2109 jermar 68
struct thread;
69
 
1 jermar 70
extern void waitq_initialize(waitq_t *wq);
1780 jermar 71
extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags);
1375 jermar 72
extern ipl_t waitq_sleep_prepare(waitq_t *wq);
1780 jermar 73
extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags);
1375 jermar 74
extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl);
2310 jermar 75
extern void waitq_wakeup(waitq_t *wq, wakeup_mode_t mode);
76
extern void _waitq_wakeup_unsafe(waitq_t *wq, wakeup_mode_t mode);
2109 jermar 77
extern void waitq_interrupt_sleep(struct thread *t);
1 jermar 78
 
79
#endif
1702 cejka 80
 
1888 jermar 81
/** @}
1702 cejka 82
 */